Stamping machine



Sept. 29, 1931.' o. c: KAVLE STAMPNG MACHINE Filed sept. 29, 192s 3Sheets-Sheet 2 /N VEN TD R `BY K TTDRNEYE.

Sept. 29, 193.1. o. c. KAVLE STAMPING MACHINE Filed Sept. 29. 1928 3Sheets-Sheet 5 "mum TTDRNEYS Patented' Sept. 29,- 1931 l oscAn. c.KAVLE, or svinicusia new"v Yonx y.

s'rniurine mineralienv yApp1iaaam mea september 29,192.8. serial No.309,231.

This invention Vrelates to" a'rotary stamp;

ing machineadapted to be used more par ticularly for stamping milkbottle caps and other circulardisksrfrom sheets of paper or otherymaterial but -is equallyuseful in making circular prints or otherimpressions upon the sheet material as the latter is fed through themachine.

The `main ob]e`ct is to provide amore expeditious and, therefore; moreeconomicalmeans for and method of manufacturing cir-k cular milk bottlecaps andl analogous disks from lsheet material thanl has heretofore ibeenpractised and', therefore, to greatly inplaten thereby assuring'thegradual` printcrease the output of the material for a given period oftime. Y y

'One ofithe specific objects is tocaus'e the stam-ping or cutting diesto befe'd by Aand between opposed rollers substantially vtan- Uentialtothe periphery of their contiguous ,faces so that allportions of theirimpression making or cutting sides `will engage the work in aplane-substantially normal to a direct line between the axesof therollers thus permitting the --use of circular dies lof exactly the samediametersy *lasthe varticles formed thereby. f

`Ir am aware thatprint -or stamping :rollers with dies secured to theperipheries thereof have heretofore been usedffo'r printing and stampingpurposes, but in such cases theVV dies are usually secured in fixed*relation t-othe rotary carrier and, therefore, their printing orstamping surfaces must 'be Vsubstantially concentricY withl the axisoffrotation of the carrier in order toproperly cooperate with the rotaryplaten for `printing or stamping the work upon orfrom thesheets so thatif thek vwork lisl to be circular it -is necessary to deform theprintingorl cutting faces of the dies to compensate for the diference betweenthe length of the arcsof the printing or cutting faces andthejdirectfdistance between theven'ds 'of "the printing or stampingfaces in the direction of rot-ation.'

diameter lengthwise of the axis fof the carrier.v ,That is, the'printing or cutting face of each die forproducing circular workwould'have vto be made elliptical which,'of course, is more -or lessprohibitive by jreason `oftheincreased cost of production. ofthediesfdueto such deformation. f fOne of'applicants objectsis to use of'the more veconomically produced circular dies by -liingedlyrv mounting'the same upon therotary carrier in such manner that they maybe'"carri`ed therebyto the printing or lcutting position inV aplanesubstantially tangential to the peripheryof the rotary ingor'cutting of the'circular Vwork ,from Y to endV in the direction ofrotation ofthe contiguous Afa'cesof the rollers and 'yet maintaining asubstantially radial thrust @of ythe dies againstthe Vplatennormal toits printing orvcutting surface. t

`In other words, applicant'has sought to obtain all ofthe advantages lof'the plungertype stampingmachines,` together rwith the speed ofproductionk rof-stamping machines of the rotary typef? f Y O her objectsand uses relating to specific parts of the machine willbe. brought outin the following description; f.

In the drawings t j Figure l is a front face view 'of theportionzofarotary stamping-'machine embody# ing the'ivarious features of myinvention.V

VLFigure-Qis anend view of the same mechanism vomittingthe driving gearand showing aportion Yof a sheet material upon orffrom which ythe* workis to befprinted orcut."

Figure' 3 isv an enlarged sectional viewf, partly broken l away, takenin the planeof line'Figure l.

Figure tais a detail section-al view taken in the plane ofl-ine 4-4,'Figure 3.. p F igurev is also a detail sectional view taken inthe planeof line 45**5, Figure 3.

lFigure is anouter end face view of one of the detached diesshown-in-Figure 3.

' F igure 7 is afdeta`il sectional rView taken s in the plane-of line7-47 ,Figure '3;

Figure-8 isa detail lsectional view of one of the detached '-dies,l thedotted lines .indipermit ooY ` entially yand longitudinally eating theperipheries of the lower and upper rollers. Y Y Y Figures 9 and 10 areperspective views respectively of one of, the die holders'and one of thedies.

As illustratedthis machine comprises opposed rollers `-l-.- and 2'-journaled in` suitable bearings and on a sup porting frame h5- to rotateaboutparallel axes, preferably one above the other.

The roller 1 is relatively larger than 26 inaftei` described.k

The peripheries of thegrollers 1J- and -2 are. preferably 'concentricwith their respective axes of rotation to form circular bearing surfacesagainst kwhich the opposite faces of the'` dies 16- are adapted to roll,the surfacearea of the roller -lf-,being suflicient to .receive andsupport a-relatively large numberof the dieser-6- in 'more or lessuniformly spaced relation circumfer- Any suitable means may be providedfor rotatingone orboth 'of .the rollers 1.- and -2- but,A asillustrated, rotary motiongis transmitted kfrom any available source ofpower to the roller .-1- through the me from the sheet materiall.e

Thewdies are constructed upon the roller ,-1

and mounted 1n suchv manner as to Y feed them in a plane tangential tothe contiguous portions ofthe peri Jhery of Aboth rollers and,therefore, at, rightangles to a directline between the axes ofthefrollers therebycombining the advantages of the plunger typeY of`stamping machines with those of the rotary type,. which lat-ter is muchmore expeditious in the work turnoutjfor a givenperiodfof time than theplunger type ofjmachine by reason of the fact that the movement of thedies'is practically continuous in one and the same direction whereas,theplunger type must be more or less intermittent;yk Y

, v The several dies and the individual devices for attaching them tothe'roller --l-v are identical lin that each die comprises7 in thisinstance, a circular body portionvhaving its the dies andthe sheet -afbyand between u outer side provided with a circular chamber -8- forming anannular flangel 9- which is beveled outwardly to form a circular cuttingedge -l0* adapted to engage the periphery of theroller platen 2 forcutting circular disks of corresponding diameter from the sheet material-was the latter` is fedl between the dies and contiguous face oftheplaten. c Y

The inner side of the die 6- is provided with -a substantially flatbearing surface -llparallel with the outer cutting edges '-lO- andadapted to engage the periphery of the rotary carrier` or roller -1-whereby the cutting faces of the dies will be forced against theperiphery of the platen as the rollers are rotated in the directionindi; cated by arrows -az-, Figure 2. v y The distance between thecutting edge 10,- and bearing surface -11 of each die issubstantiallyequal to the distance'between the contiguous faces of the rollers -land-2 in directline between the axesl ofsaid rollers to assure the feedingof said rollersas thelatterare rotated.

Suitable means is provided for causingthe dies to be successively fed`between the rollers in a plane tangential to the peripheries thereof asshown more clearly iny Figures 2 and S and for this purpose the Adiesare hingedly connected to the rotary carrier -l-.- in uniformly spacedrelation circumferentially and preferably in parallelvcir-K cumferentialrows as shown in Figure l.

In order to establish hinge 4,connections between the dies '-6- androtary carrier -l-said carrier is provided with a multi- Vplicity ofisimilar recesses-lQ- opening vthrough V.the peripheries thereof and arfrangedin uniformly spaced relation circumferentially andlongitudinally,v one for each die,V for receivinga corresponding numberof die,l supporting blocks ,-13- and lugs ,--14- projecting inwardlyfrom the bear;v ing ,faces llV-f, as shown in Figure 7.

,Each die supporting block .-13- is removably'secured to the carrier -1-within its corresponding recess '--12- by means of a pair of clampingscrews 115-c, Figure 3and is provided midwayl between its ends with an Youtwardly projecting apertured lug 16j-.for receiving a pivotal bolt-17-71 which *isY passed through registeringfslots *1S-H in the oppositelugs -14= Aof the die, as shown in Figures 7 and 8, said slots beingelongated inV the direction of the axis of ,thedie +76- to permit inwardand outward rocking movement of the die against vthejperiphery of theroller -lfas indi-2 cated by .the different positions'of the dies inFigure 8 in transit, to and from their cutting positions! 1 Y f TheYrecesses l2-in the peripheries. of the rQl1e1...-.l-Larelpreferablyrulri shown in,` Figurev 4, while theme-supporting. blocksf``l3vV are of substantially'the same length circumferentially oftherollerlfas the diameter of their corresponding vrecessesso that theend-walls ,of the recesses r serve to assist the lclamping bolts'-l--in'holding the die supporting blocks against' endw-ise movement,said blocks; being oflessV Width v in thevdirection -of length. oftheaxis-of the noller 1 than thediameters of theircorresponding recessesf`12 vandjare arranged diametrically of and within'said reccesses so as`to :permit Vthe lugs jk-'lion they inner ends of the dies to projectinto the recesses atopposite-sides of the adjacent `supporting blocks-M,l v

The lugs -l6 on wthe die-supporting blocks --lB--eXtend a relativelyshort distance beyond the periphery of the' roller -l-- andalsovnormallylextend beyond the plane of the bearing surfaces-llofthedies into complementary-openings *19* in the central portions ofthecorresponding dies ,-6-, Figures 3 and 7, withjust sufficient clearanceto allow :free rocking movement of the-dies upon'fthe peripheryfof theroller -4land also free inward and outward lmovement relatively to theblocks 1S- within the limits of the end walls of the slots`18-.` .je fThe dies are yieldingly held in planes tangential to the periphery ofthe roller 4l-'- byv means of coiled springsA may be said to moveforwardlyin the` direc tion indicated by arrows -m-,- Figure 3, and withthis understanding Vthe springs -20 will be located at the rear ofthepivotal pins-l-y and, therefore, at the rear of the axes of thecirculardies --6--v thereby yieldingly holdingthe portions of the bearingsurfaces -llof the dies in front of the pivots -17- in tangentialcontact with the periphery of the roller -1-, it being understood thatthe spacing of the end walls of the slots ,18- for the pivotal pins -17-will be sulicienttopermit tant gential contact of the bearing surfaces-llof the dies with the periphery of the fico roller -las they are movedto dilferent angles in transit to and from their stamping positionsbetween Athe rollers --1-V and Suitable means" is provided for `ejectingthe circular disksfrom their respective dies `as said disks are"vsuccessivelyA *outfrom. the

sheet material and f for:4 this purpe cach'dieis provided withI asubstantiallycircular ej'ectorsfplate'- -:21'-.movable in therecess'i-Sinfthe cuttingfside'y of theL die and providedwithydiametricallyopposite inwardly projectingguide pins extending looselythrough openingse-:Q- inthe body of the die and having their inner-ends`proi'fidedlwith heads 4which aremovable inf-corres onding 'socketsinthe inner face ofthe :die kto hold 'the ejector plate against undueoutwardfmoveinent asshown inthe lower right `hand of Figure .3. V Theseejector plates `-2l1 *are Iyieldingly held in their outermostpositionsbyycoiled springs interposed between saidlplate andv the inner wallofthe{recess-S- and preferably surrounding' the` guide -pi'ns -22 whichserve-to hold the Vsprings againstlateraldisplacement. I 'n 1 Eachejector-plate'V is? provided with open-iV ings -26 therethroughtop'ermit the en# trance' of `a screw driver or similar tool by whichthe screws -`-l5/aretightened or loosenedk in the operation ofdisplacing or replacing the die supporting i. Operation" iD-uiting the.rotation of the die Carrier v--lVin-the vdirection indicatedfby arrows,m'-'-,Figure 2, the dies willbe Ycarried in' the same directionlbetweenandlin contact with" the f periphery f of the f rollers vland fintaplanetangential to said periphcries as-shown in Figure 3 while thesheetmaterial =1s vfedbetweeny the cutting faces of the dies andcontiguousface of the platen roller thereby'effecting the cut- A1 ting .ofz'circular-' disks fromfthe- 'sheet as the dies'` and sheetarefedbetween thev rollers. Y Duringlthis `cutting operation of the disks thelatter will, ofcourse, engage: the 'ejector against theaction ofthesprings -25- and plates 2l-e ,and force the same vinwardly, -Tf *i assoon as the dies pass beyond the contigu-A ousfaces ofthe `rollers andthe disks cutbyztheseveral; dies will be automaticallyejected from saiddies by the outward; movementof thenejector platesQl due; to the. actionof the springs .A Q25-, these operationsbeing continued duringI thecontinuous rotation of the rollers and con.-A

tinuous`- feedingof the sheet material -aef between the dies and platenroller;

It will be seen from the foregoing-de-- scription Aand -theaccompanyingdrawings thatthe die'carrier,fl'f-Y and platen maybe rotatedfcontinuously, at. Highspeed 1" which 'together with [the relatively.'lAlarge number of diescarried by the roller f,-`l

timewith the `"assurancethatall of the disks iii;

l enables the operatortoturniout anex'trem'e; Y lylarge amount of workink a relatively short cut from thesheet material will Vbe uniform.

It will beV evident, however, that; various changes may be madein theform of the Vdie and method of mountingthe same' and -that other dies`for printingorv cutting purposes may be substituted and operated inaVsimilar manner without departing from the spirit of this invention. fWhat I claim is: l

l. In a machine for stamping disksfrom sheet material, a rotaryplaten-element,fa rotary diecarrying element having'its die tiltablymounted `thereon *andv adapted to be fed thereby between and in contactwith both of said elements tangential to the contiguous faces thereof.Y, 2. -In` a machine for stampingdisks'from sheet material, opposedrollers, and dies car-Y ried by one of the rollers to pass between thecontiguous faces Yof. both rollers in contact therewithand'tltable'relatively to said faces toa plane tangential thereto whilepassing between them. f- 3. In a machine for stamping disks from sheetmaterial, opposed rollers having cylindrical bearing surfaces in spacedrelation, a die having its opposite facesr disposed in parallel planes adistance apart corresponding to the space between said bearing surfaces,and connections'betweenone of the Y rollers and die for feedingl thelatter tangentially between the contiguous bearing surfaces of bothrollers with its yopposite faces in contact therewith. 1

4,-. In a stamping machine,l a rotaryele-V mentfhaving a cylindricalbearing-surface concentric with its'raXis of rotation, a die mounted onsaid bearing surfaceand tiltable thereon, means for urging theV die totilt in the direction of rotation ofsaid element, and a platencooperating. wlththe moving die and across which the work is fed toreceive the impression of thez-die.

5. In a stampingmachinaa rotary elementhaving a cylindrical bearingsurface concentric with its vaxis ofrotation, a-.die

mounted on said bearing surface and tiltable thereon, means for urgingthe dieto tilt inthe direction of rotation of said element, and a platencooperating with the movingv die and across which the Work is fed toreceive the impression of the die, saiddie being free to rock on saidcylindrical bearing surface to allow it to assume a positionsubstantially tangential to theV cylindrical bearing surface during itstransit across the platen.

6. In a stamping machine, a rotary element having aY cylindrical bearingsurface concentric with its aXisof rotation, a die hinged to said rotaryelementv to permitthe die to lrock thereon and having a flat sur` faceadaptedto engage said bearing surface when Vvthedie isrocked, andarotary work- .v 8. Inamachine for making circular disks from sheetmaterial, al rotary carrier hav.v

ing a concentric peripheral surface, a rotary platen 'parallel with andin spaced relation to the carrier for supporting said'sheet material,andv dies tiltably lmounted upon said. carrier rand .provided -with fiatfaces in rolling` contact with saidj peripheral surface, saidvdi'eshaving cutting faces disposed vin planes parallel with the vflat faces"and cooperatin(r kwith the platenfor cutting disks from thev sheetmaterial as the dies are carried between the carrier and platen. Y

9. In a machine for making circular-.disks from sheet material,vcooperative rollers rotatable about parallel axes in vspaced relation,'and'dies hingedly mounted on one jof the rollers tofmove therewith intoengagement with the other roller forV cutting thedisks,` the sheetmaterial being fed'by and between thelastnamed roller and adjacent faceof thedie. y

In witness whereof I have hereunto set my hand tlns2lst-tlay ofSeptember, 1928.

OSCAR C. KAVLE.

